Read the little blurb here
http://www.djdeals.co.uk/prod-details.asp?AID=2079 and look deeper into the manuals on their site. The "amp pack" you're supposed to buy to run them is a 4channel amp, high, mid, lowmid, and sub. The cabs may not have any internal passive crossover thus the wierd jacks. Re-wiring and hooking up a bass amp could send a full signal to all the speakers, blowing the top 2. I'd do more reading and checkout prices etc. before doing anything.